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David L. Fagle
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Journal Articles
The American Biology Teacher. 1961; 23142–45 doi: https://doi.org/10.2307/4439465
Published: 01 January 1961
Journal Articles
Journal Articles
Journal Articles
The American Biology Teacher. 1956; 186196–197 doi: https://doi.org/10.2307/4438823
Published: 01 October 1956